Improper error handling in Cisco IOS XR - CVE-2025-20172
Published: February 6, 2025 / Updated: May 2, 2025
Vulnerability identifier: #VU103678
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-20172
CWE-ID: CWE-388
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper error handling in the SNMP subsystem. A remote authenticated user can send specially crafted SNMP versions 1, 2c, or 3 requests to the affected system and perform a denial of service (DoS) attack.
Affected software
Cisco IOS XR
Cisco IOS XE
Cisco IOS
Cisco IOS XE
Cisco IOS
How to mitigate CVE-2025-20172
Install updates from vendor's website.
Cisco IOS XR - addressed in versions 24.2.21, 24.4.2, 25.2.1
External References
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmp-dos-sdxnSUcW
- https://www.zerodayinitiative.com/advisories/ZDI-25-271/
- https://www.zerodayinitiative.com/advisories/ZDI-25-272/
- https://www.zerodayinitiative.com/advisories/ZDI-25-274/
- https://www.zerodayinitiative.com/advisories/ZDI-25-273/